12728626 has 16 divisors (see below), whose sum is σ = 19617048. Its totient is φ = 6192000.

The previous prime is 12728609. The next prime is 12728657. The reversal of 12728626 is 62682721.

It can be written as a sum of positive squares in 4 ways, for example, as 12595401 + 133225 = 3549^2 + 365^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12728591 and 12728600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11806 + ... + 12838.

Almost surely, 2^12728626 is an apocalyptic number.

12728626 is a deficient number, since it is larger than the sum of its proper divisors (6888422).

12728626 is a wasteful number, since it uses less digits than its factorization.

12728626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197.

The product of its digits is 16128, while the sum is 34.

The square root of 12728626 is about 3567.7200002242. The cubic root of 12728626 is about 233.4858191481.

The spelling of 12728626 in words is "twelve million, seven hundred twenty-eight thousand, six hundred twenty-six".